Rear bumper of automobiles



FIG. 1 is a front view of a rear bumper of automobiles showing my new design;

FIG. 2 is a plan view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a right side view thereof, and,

FIG. 5 is a front perspective view thereof.

The broken lines shown in FIGS. 1-5 are for the purpose of showing environmental structure only and form no part of the claimed design. 

The ornamental design for a rear bumper of automobiles, as shown and described. 